Thanks,
Sorry about the unnecessary post. More reflection was required on my part.
I was doing it backwards.
When y { 9 !: 8 '' didn’t produce what I wanted, I eventually tried
(([: ;/ >:@:i.@:#) ,. ])9!:8 ''
I was showing error number with message, and to get the error number index had
to be incremented.
This just shows (for my case of sloppy thinking) that always using index origin
zero ( quadIO <- 0 in APL) makes great sense!
That is over and above other reasons incl using negative indexing, modulo and
Boolean values .
Ian
-----Original Message-----
From: General <[email protected]> On Behalf Of bill lam
Sent: Tuesday, 25 February 2020 1:44 PM
To: [email protected]
Subject: Re: [Jgeneral] Incorrect documentation Foreign 13!:8
The array returning by 9!:8 is 1-origin.
3{.9!:8''
+-------------------+-----+------------+
|attention interrupt|break|domain error|
+-------------------+-----+------------+
2{9!:8''
+------------+
|domain error|
+------------+
error number 3 is domain error.
Tue, 25 Feb 2020, Ian Shannon написал(а):
> Greetings,
>
> I'm not sure if this is the correct list. Sorry if that is the case.
>
> The "result" field in documentation at
> https://code.jsoftware.com/wiki/Vocabulary/Foreigns#m13
> for 13!:8 is
> <quote>
> Error number ({.,y) is raised, with the error text changed to x if
> given (default error text is (<:y) { 9!:8 '') Signaling error number
> 55 has the same effect as throw.
> </quote>
>
> The action involves **incrementing** y not **decrementing** y as shown
> here. Hence, text Needs to be changes to =>
>
> ... (>:y) { 9!:8 '') ...
>
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